U.S. patent number 6,948,775 [Application Number 10/785,165] was granted by the patent office on 2005-09-27 for office chair armrest.
Invention is credited to Po-Chuan Tsai.
United States Patent |
6,948,775 |
Tsai |
September 27, 2005 |
Office chair armrest
Abstract
An office chair armrest includes a support rod, a base, a
locating seat, a mounting seat and an upper cover, wherein the base
has a chamber having at least one guide rail each provided with
engagement grooves; the locating seat has a recess having
engagement grooves and at least one engagement block for engaging
in on of the engagement grooves of the base by means of resilience
of a spring; the mounting seat has at least one engagement block
for engaging in one of the engagement grooves of the locating seat
by means of resilience of a spring, thereby enabling the office
chair armrest to be adjusted to move forward, backward, leftward or
rightward by a user himself according to his own need to be in a
proper position or at a proper angle that is comfortable for his
arm to be rested on.
Inventors: |
Tsai; Po-Chuan (Tainan City,
TW) |
Family
ID: |
34861573 |
Appl.
No.: |
10/785,165 |
Filed: |
February 20, 2004 |
Current U.S.
Class: |
297/411.37;
297/411.2; 297/411.35; 297/411.38 |
Current CPC
Class: |
A47C
1/03 (20130101) |
Current International
Class: |
A47C
7/54 (20060101); B60N 2/02 (20060101); A47C
007/54 () |
Field of
Search: |
;297/411.2,411.38,411.35,411.37 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Cranmer; Laurie K.
Claims
What is claimed is:
1. An office chair armrest comprising: a support rod capable of
being combined with one side of an office chair and having a fixed
seat disposed at an upper end thereof and a positioning plate
mounted in said fixed seat, said positioning plate having a
protrusion disposed thereon and a slide block disposed at an upper
end of said protrusion and provided with a threaded hole; a base
capable of being assembled on said fixed seat of said support rod
and having a chamber disposed therein, said chamber having at least
one guide rail disposed therein and an elongated slot formed
therein and extending through a bottom thereof, said at least one
guide rail each provided with a plurality of engagement grooves; a
locating seat capable of being assembled in said chamber of said
base and having a recess disposed therein and at least one recessed
groove disposed on a bottom surface thereof, said recess having a
plurality of engagement grooves disposed on a wall surface thereof
and an axle hole formed therein, said at least one recessed groove
each having at least one depression disposed therein and a fixing
plate affixed thereto, said at least one depression each having a
spring, a retaining block and an engagement block orderly fitted
therein; a mounting seat capable of being assembled in said recess
of said locating seat and having an axle journal disposed at a
bottom surface thereof, a through hole formed therein and at least
one recessed groove disposed on said bottom surface thereof, said
through hole extending through said axle journal and capable of
being passed through by a screw member, said at least one recessed
groove each having a depression disposed therein and a fixing plate
affixed thereto, said depression having a spring, a retaining block
and an engagement block orderly fitted therein; and, an upper cover
capable of being assembled on said base.
2. The office chair armrest as claimed in claim 1, wherein said
fixed seat of said support rod has a plurality of stubs disposed
therein and each of said stubs is provided with a threaded hole;
wherein said positioning plate has a plurality of through holes
capable of being aligned to said stubs of said fixed seat; and,
whereby each of said through holes of said positioning plate can be
passed through by a screw member to make said positioning plate
securely screwed with said stubs of said fixed seat.
3. The office chair armrest as claimed in claim 1, wherein said
base has a plurality of through holes; wherein said upper cover has
a recess disposed in an interior thereof, and said recess has a
plurality of stubs disposed therein and capable of being aligned to
said through holes of said base; and, whereby said upper cover and
said base can be screwed together by screw members.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an office chair armrest, particularly to
one including a support rod, a base, a locating seat, a mounting
seat and an upper cover, wherein the base has a chamber disposed
therein, the chamber having at least one guide rail disposed
therein, the at least one guide rail each provided with a plurality
of engagement grooves; the locating seat has a recess disposed
therein and at least one engagement block protruded at both sides
thereof, the recess provided with a plurality of engagement
grooves, the at least one engagement block each capable of engaging
in one of the engagement grooves of the at least one guide rail of
the base by means of resilience of a spring; the mounting seat
capable of being assembled in the recess of the locating seat has
at least one engagement block protruded at both ends thereof, the
at least one engagement block each capable of engaging in one of
the engagement grooves of the recess of the locating seat by means
of resilience of a spring; whereby the engagement blocks of the
locating seat and the mounting seat may engage respectively in the
engagement grooves of the base and the locating seat by means of
resilience of the springs, thereby enabling the office chair
armrest to be adjusted to move forward, backward, leftward or
rightward by the user himself according to his own need to be in a
proper position or at a proper angle that is comfortable for his
arm to be rested on.
2. Description of the Prior Art
Generally speaking, known conventional office chair armrests 10
integrally formed, as shown in FIG. 1, are combined with both sides
of an office chair 12 by screw members 11 for arms of a user to be
rested on. However, the conventional office chair armrests 10 are
assembled with the office chair 12 in such a stationary way that
the user is unable to move them forward or backward to be in proper
positions, or rotate them leftward or rightward to be at proper
angles according to his own need.
SUMMARY OF THE INVENTION
The main purpose of the invention is to offer an office chair
armrest adapted to be adjusted to move forward, backward, leftward
or rightward by a user himself according to his own need to be in a
proper position or at a proper angle that is comfortable for his
arm to be rested on.
The main feature of the invention is to provide an office chair
armrest mainly including: a support rod capable of being combined
with one side of an office chair and having a fixed seat disposed
at an upper end thereof and a positioning plate mounted in the
fixed seat, the positioning plate having a protrusion disposed
thereon and a slide block disposed at an upper end of the
protrusion and provided with a threaded hole; a base capable of
being assembled on the fixed seat of the support rod and having a
chamber disposed therein, the chamber having at least one guide
rail disposed therein and an elongated slot formed therein and
extending through a bottom thereof, the at least one guide rail
each provided with a plurality of engagement grooves; a locating
seat capable of being assembled in the chamber of the base and
having a recess disposed therein and at least one recessed groove
disposed on a bottom surface thereof, the recess having a plurality
of engagement grooves disposed on a wall surface thereof and an
axle hole formed therein, the at least one recessed groove each
having at least one depression disposed therein and a fixing plate
affixed thereto, the at least one depression each having a spring,
a retaining block and an engagement block orderly fitted therein; a
mounting seat capable of being assembled in the recess of the
locating seat and having an axle journal disposed at a bottom
surface thereof, a through hole formed therein and at least one
recessed groove disposed on the bottom surface thereof, the through
hole extending through the axle journal and capable of being passed
through by a screw member, the at least one recessed groove each
having a depression disposed therein and a fixing plate affixed
thereto, the depression having a spring, a retaining block and an
engagement block orderly fitted therein; and, an upper cover
capable of being assembled on the base.
BRIEF DESCRIPTION OF DRAWINGS
This invention will be better understood by referring to the
accompanying drawings, wherein:
FIG. 1 is a perspective view of an office chair and known
conventional armrests;
FIG. 2 is an exploded perspective view of an office chair armrest
in the present invention;
FIG. 3 is a perspective view showing an assemblage of the office
chair armrest in the present invention;
FIG. 4 is a sectional view showing an assemblage of the office
chair armrest in the present invention;
FIG. 5 is a schematic view illustrating the office chair armrest in
the present invention capable of being adjusted to move forward and
backward; and,
FIG. 6 is a schematic view illustrating the office chair armrest in
the present invention capable of being adjusted to move leftward
and rightward.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
A preferred embodiment of office chair armrest in the present
invention, as shown in FIG. 2, mainly includes a support rod 2, a
base 3, a locating seat 4, a mounting seat 5 and an upper cover
6.
The support rod 2 capable of being combined with one side of an
office chair has a fixed seat 20 disposed at an upper end thereof
and a positioning plate 23 mounted in the fixed seat 20. The fixed
seat 20 has a plurality of stubs 21 disposed therein and each of
the stubs 21 is provided with a threaded hole 22. The positioning
plate 23 has a plurality of through holes 24 capable of being
aligned to the stubs 21 of the fixed seat 20 and each of the
through holes 24 can be passed through by a screw member 25 to make
the positioning plate 23 securely screwed with the stubs 21 of the
fixed seat 20. The positioning plate 23 further has a protrusion 26
disposed thereon and a rectangular slide block 27 disposed at an
upper end of the protrusion 26 and provided with a threaded hole
28.
The base 3 capable of being assembled on the fixed seat 20 of the
support rod 2 has a chamber 30 disposed therein and a plurality of
through holes 34 for being passed through by screw members 35. The
chamber 30 has two guide rails 31 respectively disposed adjacent
both sides thereof and an elongated slot 33 formed therein and
extending through a bottom thereof. The two guide rails 31 have an
inner surface disposed opposite to each other and provided with a
plurality of engagement grooves 32.
The locating seat 4 capable of being assembled in the chamber 30 of
the base 3 has a recess 40 disposed therein and two recessed
grooves 43 respectively disposed at both sides of a bottom surface
thereof. The recess 40 has a pair of plurality of engagement
grooves 41 respectively disposed at both ends of a wall surface
thereof in positions opposite to each other and an axle hole 42
formed therein. Each of the two recessed grooves 43 has two
opposite depressions 44 disposed therein and a fixing plate 48
affixed thereto. Each of the two depressions 44 has a spring 45, a
retaining block 46 and an engagement block 47 orderly fitted
therein.
The mounting seat 5 capable of being assembled in the recess 40 of
the locating seat 4 has an axle journal 50 disposed at a bottom
surface thereof, a through hole 51 formed therein and two recessed
grooves 53 respectively disposed at both ends of the bottom surface
thereof. The through hole 51 extends through the axle journal 50
and may be passed through by a screw member 52. Each of the two
recessed grooves 53 has a depression 54 disposed therein and a
fixing plate 58 affixed thereto. Each of the depression 54 has a
spring 55, a retaining block 56 and an engagement block 57 orderly
fitted therein.
The upper cover 6 capable of being assembled on the base 3 has a
recess 60 disposed in an interior thereof. The recess 60 has a
plurality of stubs 61 disposed therein and aligned to the through
holes 34 of the base 3.
In assembling, referring to FIGS. 2, 3 and 4, firstly mount the
positioning plate 23 in the fixed seat 20 of the support rod 2
securely by the screw members 25.
Secondly, fit the springs 45, the retaining blocks 46 and the
engagement blocks 47 orderly into the depressions 44 of the
locating seat 4 with the engagement blocks 47 protruded out of the
depressions 44 of the locating seat 4, and then fix the fixing
plates 48 respectively onto the recessed grooves 43 to make the
springs 45, the retaining blocks 46 and the engagement blocks 47
limited in the depressions 44 of the locating seat 4.
Thirdly, fit the springs 55, the retaining blocks 56 and the
engagement blocks 57 orderly into the depressions 54 of the
mounting seat 5 with the engagement blocks 57 protruded out of the
depressions 54 of the mounting seat 5, and then fix the fixing
plates 58 respectively onto the recessed grooves 53 to make the
springs 55, the retaining blocks 56 and the engagement blocks 57
limited in the depressions 54 of the mounting seat 5.
Fourthly, assemble the locating seat 4 in the chamber 30 of the
base 3 with the engagement blocks 47 that are protruded at both
sides of the locating seat 4 engaging in the engagement grooves 32
of the guide rails 31 of the base 3.
Fifthly, assemble the mounting seat 5 in the recess 40 of the
locating seat 4 with the engagement blocks 57 that are protruded at
both ends of the mounting seat 5 engaging in the engagement grooves
41 of the recess 40 of the locating seat 4.
Sixthly, place the base 3 on the fixed seat 20 of the support rod 2
with the rectangular slide block 27 of the positioning plate 23 of
the fixed seat 20 protruded upwards in the elongated slot 33.
Seventhly, pass the axle journal 50 of the mounting seat 5 though
the axle hole 42 of the recess 40 of the locating seat 4 to make
the through hole 51 of the mounting seat 5 aligned to the threaded
hole 28 of the rectangular slide block 27, and then insert the
screw member 52 into the through hole 51 of the mounting seat 5 to
make the screw member 52 screwed with the rectangular slide block
27.
Finally, assemble the upper cover 6 on the base 3 by having the
screw members 35 passed through the through holes 34 of the base 3
and screwed with the stubs 61 of the upper cover 6, by which an
assemblage of the whole structure of the office chair armrest in
the present invention is completed.
When the office chair armrest of the present invention is to be
adjusted forwards or backwards, referring to FIG. 5, it is only
necessary to force the office chair armrest to move forward or
backward with the base 3 and the upper cover 6 moved together, by
which the engagement blocks 47 that are protruded at both sides of
the locating seat 4 and engage in ones of the two pluralities of
engagement grooves 32 of the guide rails 31 of the base 3 are
forced to be shrunk into the depressions 44 of the locating seat 4
by the pressing of the guide rails 31 of the base 3 to make the
springs 45 that are also disposed in the depressions 44 to be in a
compressed status until the engagement blocks 47 are respectively
forced to slide into and urged to engage in any required ones of
the two pluralities of engagement grooves 32 firmly in position
under the resilience of the springs 45, thus the adjustment of the
office chair armrest in the present invention to move forward or
backward can be achieved easily.
When the office chair armrest of the present invention is to be
adjusted leftwards or rightwards, referring to FIG. 6, it is only
necessary to force the office chair armrest to rotate leftward or
rightward with the base 3 and the upper cover 6 moved together, by
which the engagement blocks 57 that are protruded at both ends of
the mounting seat 5 and engage in ones of the engagement grooves 41
of the recess 40 of the locating seat 4 are forced to be shrunk
into the depressions 54 of the mounting seat 5 by the pressing of
the wall surface of the recess 40 of the locating seat 4 to make
the springs 55 that are also disposed in the depressions 54 to be
in a compressed status until the engagement blocks 57 are
respectively forced to slide into and urged to engage in any
required ones of the two pluralities of engagement grooves 41
firmly in position under the resilience of the springs 55, thus the
adjustment of the office chair armrest in the present invention to
rotate leftward or rightward can be achieved easily.
Therefore, the office chair armrest can be adjusted to move
forward, backward, leftward or rightward by a user himself
according to his need to be in a proper position or at a proper
angle that is comfortable for his arm to be rested on.
While the preferred embodiment of the invention has been described
above, it will be recognized and understood that various
modifications may be made therein and the appended claims are
intended to cover all such modifications that may fall within the
spirit and scope of the invention.
* * * * *